Cartridge-cylinder unit for hypodermic syringes



Nov. 25, E947. M. LASERSOHN CARTRIDGE-CYLINDER UNIT'FOR HYFODERMIC SYRINGES Filed Aug. 30, 1946 desired time.

Patented Nov. 25 1947 CARTRIDGE-CYLINDER UNIT FOR HY PODERMIC SYRINGES Martin Lasersohn,

chester County, Inc., Wilmington, ware Greenburgh Township, West- N. Y.

, asslgnor to Sterling Drug Del., a corporation of Dela- Application August so, 1946, Serial No. 893,997

4 Claims. (01.128-218) The present invention relates to medical hypodermic syringes and more particularly to a novel and highly useful medicament cartridge and cylinder combination capable of use in standard or conventional medical hypodermic syringes.

Hypodermic syringes of various types and constructions are well known to and widely employed by physicians and other professional and technical people. InJectable medicinal preparations, which are marketed in ampules, are transferred in known manner to such a hypodermic syringe and then injected into the patient. Some injectable preparations are, however, not marketed in ampule form but rather in the form of cylinders of glass having a stopper at each end (hereinafter referred to as .cartridges) with the iniectable preparation therebetween. A special hypodermic .syringe is required for the utilization of such cartridges and such increase the cost of the injections and are not always entirely satisfactory especially when oily or viscous preparations are involved. This is particularly true in the case of the penicillin-beeswax preparations recently developed. The difiiculties and disadvantages involved in injecting these preparations are well known to physicians and others and include the designing of special syringes or parts which can be discarded, the impracticability of cleaning and sterilizing such parts for re-use and the added cost thereof which ultimately is paid by the patient. These difficulties and disadvantages have not been satisfactorily overcome in a simple economical manner so far as I am aware.

One of the objects of the present invention is to make it possible to inject penicillin-beeswax injectable preparations by means of an ordinary conventional form of hypodermic syringe found in every doctors office, hospital, etc.

Another object of the invention is to produce and market a cartridge-cylinder combination of novel character in which the cartridge itself differs from the conventional cartridges described 7 above.

A further object of the invention resides in the provision of a cartridge for injectable medica ments in which the cartridge wall has a cylindrical sleeve extension adapted to receive one end of a cartridge cylinder provided for cooperation therewith and by means of which the injectable preparation is expelled from the syringe at the An additional object of the invention is to simplify the procedure for injecting medicinal preparations by eliminating the use of a special or expensive form of hypodermic syringe and genpunctured whereas with some of the special syringes aspiration cannot be done while with others the procedure can be carried out but not with full assurance whether or not blood vessel puncture has been made. Penicillin-beeswax injectable preparations are injected into muscle and great care must be exercised so that intravenous injection is avoided.

Otherand further objects and advantages will be understood and appreciated by those skilled in this field or will hereinafter.

In the accompanying drawing:

Fig. 1 is a vertical elevational view showing the present invention ready for use, certain parts bebe apparent or pointed out ing broken away to expose the underlying structure.

Fig. 2 is a vertical sectional view taken on line 22 of Fig. 1 but showing the parts in the positions which they assume after actuation.

Fig. 3 is a view generally similar to Fig. 1, but with parts in section, of a modified form of the invention.

Fig. 4 shows the parts of Fig. 3 after actuation.

Fig. 5 is a fragmentary view showing a further form of syringe adapted for use with the present invention and Fig. 6 is a section taken along line 6-8 of Fig. 5.

Referring now in detail to Figs. 1 and 2, the numeral l0 designates the hollow barrel of a standard or conventional hypodermic syringe found in every doctors office, hospital, etc. Such a syringe is not to be confused with a dental syringe which is a special form of syringe. This syringe barrel is usually graduated so that a pre.--- determined amount of a liquid medicinal preparation can be iniectedinto a patient but the syringe may vary in its volumetric capacity, in the materials from which it is fabricated and minor details of structure. The syringe barrel which is illustrated in the drawing is composed of glass of suitable composition and is cylindrical in nature terminating at one end in a lateral flange II and at the other end in a reduced tip i 2 which has a capillary bore l3 therethrough as will hp nlnov- While glass is highly the position illustrated in Fig. 1.

from Fig. 2. A syringe of this type has a syringe cylinder 14 (Fig. 3). which is hollow or solid, having one end formed with a lateral flange l and the other end closed by a (in the case of a hollow cylinder). The tip l2 of the syringe barrel I0 is, during use, provided with a hub 11 which is applied thereto in any suitable or known manner either frictionally or interlocking and such hub is usually composed of some suitable metal or alloy such as s ainless steel, aluminum or other metallic composition. The hub I! is provided, as shown, with a needle I! which may be of any suitable or known size, type and length. The needle illustrated is a double needle but it is understood that various known types of double needle may be employed with Van-- ous types of syringe tips without departing from the spirit or scope of this invention.

From an inspection of the drawing, it will be further appreciated that cartridge i9 is a glass cylinder having a stopper 20 in one end thereof which is preferably but not necessarily flush with the terminus of the cartridge and a second stopper 2| within the cartridge and located somewhat inwardly from the opposite end of the cartridge so as to form a cartridge sleeve extension 22. The injectable medicinal preparation 23 is located between stoppers 20 and 2| and is placed therein in suitable or known fashion familiar to those versed in this field. A cartridge cylinder. 24 is provided which has a diameter such that one end thereof can be received within the cartridge sleeve extension 22 above described and cylinder 24 is sufllclently long to project appreciably from the syringe barrel l0 when assembled as shown in Fig. 1. The cartridge cylinder 24 is preferably provided with a suitable terminal enlargement such as the rubber cap member 25, this being for convenience of operation and actuation and not constituting an essential limitation upon the invention. The cartridge cylinder 24 may be hollow or solid and may be made of any suitable or desired material. suitable hard rubber, metal or other material may equally well be employed within the purview of the invention.

In preparing the structural arrangement shown in Fig. 1, the conventional syringe cylinder i4 is removed after carrying out aspiration in the usual manner to determine whether or not a blood vessel has been entered leaving only the syringe barrel l0 with the hub and needle attached thereto, it being understood that a suitable hub and double needle have been applied to the syringe barrel tip 12 prior to aspiration. The carriage I9 is then inserted into the syringe barrel l0 until it reaches the end thereof with the sleeve extension 22 projecting upwardly in The cartridge cylinder 24 with its attached cap 25 is then placed in the position shown in Fig. 1 but it is to be understood that I may, if I so desire, preassemble cartridge l9 and cartridge cylinder 24 and insert the same into syringe barrel II! as a cartridge-cylinder combination or unit. In such case, I provide some means for holding one end of cylinder 24 within sleeve extension 22 and this can most conveniently be carried out by the use of a suitable wax or adhesive composition or by the use of a simple rubber sleeve or gasket over the end of the cylinder so as to maintain the cartridge and cylinder in their temporary assembly as an integral unit. The use of such a unit is deemed preferable by me but the parts may be used either assembled as just described transverse wall it.

or as separate members without affecting the utility or operativeness of the invention as will be clearly understood. Stoppers 20 and 2|. which confine the iniectable preparation and delimit its volume to that required in a given iniection, may be made of any suitable material known to those skilled in this art, such as rubher or a synthetic or artifical rubber-like material such as neoprene. It is understood that all parts may be in a sterile condition immediately prior to use. I

The invention is then ready for use and axial pressure is now exerted against cylinder 24. This pressure first results in piercing stopper 20 and eflects communication with the iniectable preparation 23. Continuation of the axial pressure forces stopper 21' towards stopper 20 until ultimately the two stoppers abut as shown in Fig. 2 at which time the injectable preparation 23 has been expelled through the needle l8, where upon the needle is withdrawn from the patient and the parts are disassembled. The cartridge l9 and the cartridge cylinder 24 are discarded, the cartridge-cylinder combination or unit having been produced with such in view. The cartridge is of no further value but the cartridge cylinder could, if desired, be re-used. However, the cost of the parts is so small that they are normally discarded and such practice is deemed preferable. Similarly, the hub l1 and needle I! are usually discarded although they could be reclaimed. One of the major advantages of the present invention is, however, the avoidance of such cleaning and sterilizing. Attention is dirooted to the fact that, through the use of the present invention, it is never necessary to discard the syringe or any part thereof as is commonly done by physicians and operators" when using the ordinary syringe or .certain special syringes. In one type of syringe in common use the entire syringe and all its parts are discarded after a single use. At the same time and of great importance is the fact that by means of this invention aspiration may be carried out in the usual deft and sure manner so that this safety factor connected with making injections is in no way impaired nor sacrificed.

Figs. 3 and 4 disclosed a modified form of the invention in which the cartridge cylinder 24a is short and suitably held in assembled relationship with the sleeve extension 22 of cartridge II in the manner already described above with respect to Figs.'1 and 2. One end of cylinder 24a thus abuts and/or is in frictionally held contact with stopper 2|. The syringe cylinder l4, previously mentioned, constitutes a normal and ordinary part of the syringe as a. whole and is used as a supplementary cylinder to push against cartridge cylinder 24a to cause the parts to move from the positions shown in Fig. 3 to the positions shown in Fig. 4.

Cartridge cylinder 24a may or solid, and, like cylinder 24, hard rubber, metal or any other suitable material. The somewhat different form of hub Ha .and needle Ila is illustrated in these figures to show that the particular form of hub and needle does not constitute a limitation upon the invention.

The form of syringe, hub and needle illustrated in Figs. 5 and 6 further delineates how the invention is adapted to be used with known equipment and further demonstrates the versatility and utility of the cartridge-cylinder combination be either hollow may be of glass,

or unit. Figs. 5 and 6 show my invention in that such is purely illustrative and is not intended as restrictive since; other specific forms of syringes and needles can be equally well employed. It will be appreciated from the foregoing that the modification of Figs. 3 and 4 is operated in a generally similar manner to that of Figs.

' stoppers and a cartridge cylinder in axial align- 1 and 2 but that the syringe cylinder lHs additionally used togetherwith the short cartridge cylinder 24a, since in some cases it has been found that a short cartridge cylinder is better and more convenient and forms a'better cartridgecylinder unit for manufacture and production purposes.

I claim: 1. A cartridge-cylinder unit for use in the barrel of a standard medical hypodermic syringe 25 with which aspiration for blood or tissue fluid can be carried out under clear-view before injection' is made which comprises a cylindrical glass cartridge, a stopper in one end thereof substantially flush with the adjacent cartridge end, a

stopper in the other end of such cartridge disposed somewhat inwardly to provide an annular sleeve extension, an injectable preparation confined between said stoppers and a cartridge cylinder disposed in axial alignment with said cartridge and having one end thereof held within and guided by said sleeve extension.

2. A cartridge-cylinder unit for use in the barrel of a standard medical hypodermic syringe of the Luer type with which aspiration for blood or tissue fluid can be carried out under clear view before injection is made which comprises a cylindrical glass cartridge, a stopper in one end thereof substantially flush with the adjacent cartridge end, a stopper in the other end of such cartridge disposed somewhat inwardly to provide an annular sleeve extension, an injectable preparation confined between said stoppers and a. hollow cartridge cylinder disposed in axial alignment with said cartridge and having one end Re. 16,836

thereof held within and guided by said sleeve extension.

3. In combination; a standard medical hypo- W dermic syringe barrel open at one end and having its other end provided with a reduced, apertured tip, a needle hub engaging said tip and provided with a. double needle one portion of which extends through said reduced tip into the interior of said barrel, a cylindrical glass cartridge axially disposed in said syringe barrel, a stopper in each end of the cartridge, that in the end of the cartridge adjacent the. reduced .tip being substantially flush with such cartridge end and being adapted to be pierced by the portion of the needle in the barrel and that in 'the other end of the cartridge being somewhat inwardly of the cartridge end to provide an annular sleeve extension, an injectable preparation confined between said ment with said cartridge and syringe barrel and having one end held within and guided by said sleeve extension.

4. In combination, a standard Luer type mediwhich extends through said reduced tip into the interior of said barrel, a cylindrical glass cartridge axially disposed in said syringe barrel abutting the reduced end, a stopper in each end of the cartridge, that in the end of the cartridge adjacent the reduced tip being substantially flush with such cartridge end and being adapted to be pierced by the portion of the needle in the barrel and that in the other endpf the cartridge being somewhat inwardly of the cartridge end to provide an annular sleeve extension, an injectable preparation confined between said stoppers and a hollow cartridge cylinder in axial alignment with said cartridge and syringe barrel and having, one end adhesively held within and guided by said sleeve extension.

MARTIN LASERSOHN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date Cook Dec. 27, 1927 1,728,261 Brown Sept. 17, 1929 1,782,938 Pletcher Nov. 25, 1930 913.297 Krautschneider Feb. 23, 1909 

